<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>权限管理</el-breadcrumb-item>
    <el-breadcrumb-item>角色列表</el-breadcrumb-item>
  </el-breadcrumb>
  <!-- 卡片视图 -->
  <el-card>
    <el-row>
      <el-col>
        <el-button type="primary">添加角色</el-button>
      </el-col>
      <!-- 角色列表 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['dbbottm', i1 === 0 ? 'dbtop' :'','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">
                   {{item1.authName}}
                </el-tag>
                  <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <el-row :class="[i2 === 0 ? '' :'dbtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <!-- for循环嵌套渲染 -->
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                      {{item2.authName}} 
                    </el-tag>
                   <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3,) in item2.children" :key="item3.id" closable 
                    @close="removeRightById(scope.row,item3.id)">
                      {{item3.authName}}                     
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="290px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting"
             @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-row>
  </el-card>
  <!-- 分配权限对话框 -->
  <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed">
  <!-- 树形控件 -->
  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" 
  :default-checked-keys="defKeys" ref="trreRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
  data(){
    return {
      // 所有角色列表
      rolelist:[],
      setRightDialogVisible : false,
      rightslist:[],
      // 树形控件的绑定对象
      treeProps:{
        label:'authName',
        children:'children'
      },
      // 默认选中的节点id、值
      defKeys:[105,116],
      // 分配权限的id
      roleId:''
    }
  },
  created(){
    this.getRolesList()
  },
  methods:{
    async getRolesList(){
      const {data:res} = await this.$http.get('roles')
      if(res.meta.status !== 200){
        return this.$message.error('获取角色失败')
      }
      this.rolelist = res.data
      console.log(this.rolelist);
    },
    async removeRightById(role,rightId){
      // 提示用户是否删除
      const confirmesult = await 
      this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
    }).catch(err => err)

    if(confirmesult !== 'confirm') {
      return this.$message.info('取消了删除')
    }
     const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
     if(res.meta.status !== 200){
       return this.$message.error('删除失败')
     }
    //  重新赋值不渲染
     role.children = res.data
  },
  // 展示分配权限
  async showSetRightDialog(role){
    this.roleId = role.id
    // 获取所有权限的数据
    const{data:res} = await this.$http.get('rights/tree')
    if(res.meta.status !== 200){
      return this.$message.error('获取权限数据失败')
    }
    // 获取的数据保存到data中
    this.rightslist = res.data
    // 递归获取三级节点id
    this.getLeafKeys(role,this.defKeys)
    this.setRightDialogVisible = true
  },
  // 通过递归的形式，获取角色下所有的三级权限的id 并保存到 defKeys数组中
  getLeafKeys(node,arr){
    if(!node.children) {
      // 如果当前node的节点不包含children属性 就是三级节点
      return arr.push(node.id)
    }
    node.children.forEach(item => this.getLeafKeys(item,arr))
  },
  // 监听分配权限对话框的关闭事件
  setRightDialogClosed(){
    this.defKeys = []
  },
  // 点击分配
  async allotRights(){
    const keys = [
      ...this.$refs.trreRef.
      getCheckedKeys(),
      ...this.$refs.trreRef.
      getCheckedKeys()
      
    ]
    console.log(keys);
    const idStr = keys.join(',')
    
    const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
    if(res.meta.status !== 200){
      return this.$message.error('分配失败')
    }
    this.$message.success('分配成功')
    this.getRolesList()
    this.setRightDialogVisible = false
  },
}
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.dbtop {
  border-top: 1px solid #eee;
}
.dbbottm {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>